The long awaited service pack 1 for WSS and MOSS seems to be around the corner. Our friend Joel writes a preview about this in the official SharePoint team blog
http://blogs.msdn.com/sharepoint/archive/2007/11/29/preview-into-wss-3-0-sp1-and-sharepoint-server-2007-sp1.aspx
Over 60 hotfixes included, new stsadm commands and the very important capability for supporting AJAX capable web parts.